/* --------------------------------------------------------------
   Global layout
-------------------------------------------------------------- */
.ktvhvn-registration-shell {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px 60px;
    font-family: 'Inter', 'Segoe UI', Arial, sans-serif;
    color: #1f2a37;
}

.ktvhvn-registration-shell h2,
.ktvhvn-registration-shell h3,
.ktvhvn-registration-shell h4 {
    margin: 0;
    font-weight: 700;
    color: #0f1729;
}

.ktvhvn-course-picker {
    background: linear-gradient(135deg, #f3f7ff, #fff);
    border: 1px solid #e1e8ff;
    border-radius: 16px;
    padding: 24px 28px;
    margin-bottom: 28px;
    box-shadow: 0 12px 30px rgba(15, 23, 41, 0.08);
}

.ktvhvn-course-picker .picker-headline {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 20px;
}

.ktvhvn-course-picker .picker-subtitle {
    margin: 0;
    font-size: 14px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: #5673ff;
}

.ktvhvn-course-picker .picker-hint {
    font-size: 14px;
    color: #5b6475;
    background: rgba(86, 115, 255, 0.1);
    border-radius: 999px;
    padding: 8px 16px;
}

.ktvhvn-course-picker .picker-field {
    display: flex;
    align-items: center;
    gap: 16px;
}

.ktvhvn-course-picker .picker-field label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: #0f1729;
}

.ktvhvn-course-select {
    flex: 1;
    padding: 14px 18px;
    border-radius: 12px;
    border: 1px solid #d6daf3;
    background: #fff;
    font-size: 15px;
    transition: box-shadow 0.2s ease;
}

.ktvhvn-course-select:focus {
    outline: none;
    border-color: #5570ff;
    box-shadow: 0 0 0 3px rgba(85, 112, 255, 0.2);
}

/* --------------------------------------------------------------
   Buttons
-------------------------------------------------------------- */
.ktvhvn-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    border: none;
    border-radius: 8px;
    padding: 5px 10px;
    font-weight: 500;
    font-size: 14px;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.ktvhvn-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 20px rgba(15, 23, 41, 0.15);
}

.ktvhvn-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
}

.ktvhvn-btn-primary {
    background: #0e64ff;
    color: #fff;
}

.ktvhvn-btn-success {
    background: #22c55e;
    color: #fff;
}

.ktvhvn-btn-warning {
    background: #ffb200;
    color: #0f1729;
    border: 1px solid transparent;
}

.ktvhvn-btn-outline {
    background: #fff;
    border: 1px solid #cfd5f7;
    color: #0f1729;
}

/* --------------------------------------------------------------
   Payment Summary Section (Bottom of courses)
-------------------------------------------------------------- */
.ktvhvn-payment-summary-section {
    border-top: 2px solid #e5e9ff;
    padding: 24px 0 0;
    margin-top: 24px;
}

.ktvhvn-activation-notice {
    background: #fff7d6;
    border: 1px solid #fde68a;
    border-radius: 14px;
    padding: 16px 18px;
    font-weight: 600;
    color: #92400e;
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.ktvhvn-activation-notice i {
    font-size: 20px;
}

.ktvhvn-activation-notice p {
    margin: 0;
}

.ktvhvn-payment-summary-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
}

.ktvhvn-summary-total {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 18px;
    color: #475467;
}

.ktvhvn-summary-total strong {
    font-size: 32px;
    color: #0f1729;
    font-weight: 700;
}

.ktvhvn-payment-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

.ktvhvn-payment-actions .ktvhvn-btn {
    min-width: 160px;
    padding: 12px 24px;
    font-size: 15px;
}

@media (max-width: 768px) {
    .ktvhvn-payment-summary-row {
        flex-direction: column;
        align-items: stretch;
    }

    .ktvhvn-summary-total {
        justify-content: center;
    }

    .ktvhvn-payment-actions {
        flex-direction: column;
    }

    .ktvhvn-payment-actions .ktvhvn-btn {
        width: 100%;
    }
}

/* --------------------------------------------------------------
   Layout
-------------------------------------------------------------- */
.ktvhvn-layout {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(280px, 380px);
    gap: 30px;
    align-items: start;
    margin-bottom: 40px;
}

@media (max-width: 991px) {
    .ktvhvn-layout {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

.ktvhvn-layout-main {
    background: #fff;
    border-radius: 18px;
    border: 1px solid #eef1fb;
    padding: 10px;
    box-shadow: 0 10px 30px rgba(15, 23, 41, 0.08);
    min-height: 300px;
}

.ktvhvn-cart-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.ktvhvn-cart-item {
    border: 1px solid #e5e9ff;
    border-radius: 16px;
    padding: 10px;
    background: #fff;
    box-shadow: 0 4px 12px rgba(15, 23, 41, 0.06);
    transition: all 0.3s ease;
}

.ktvhvn-cart-item:hover {
    box-shadow: 0 8px 20px rgba(15, 23, 41, 0.1);
    transform: translateY(-2px);
}

.ktvhvn-cart-item-head {
    display: flex;
    justify-content: space-between;
    gap: 8px;
    align-items: flex-start;
    margin-bottom: 8px;
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    .ktvhvn-cart-item-head {
        flex-direction: column;
        gap: 16px;
    }

    .ktvhvn-cart-variation {
        width: 100%;
    }

    .ktvhvn-cart-variation select,
    .ktvhvn-cart-variation--static span {
        width: 100%;
    }
}

.ktvhvn-cart-item .course-title {
    font-size: 18px;
    font-weight: 700;
    margin: 0 0 8px;
    color: #111827;
}

.ktvhvn-cart-variation {
    display: flex;
    flex-direction: column;
    gap: 6px;
    width: 250px;
    flex-shrink: 0;
}

.ktvhvn-cart-variation label {
    font-size: 13px;
    font-weight: 600;
    color: #64748b;
}

.ktvhvn-cart-variation select,
.ktvhvn-cart-variation--static span {
    border: 1px solid #d9dff6;
    border-radius: 10px;
    padding: 12px 14px;
    font-size: 14px;
    background: #fff;
    color: #0f1729;
    width: 250px;
    min-height: 44px;
    line-height: 1.5;
    overflow: visible;
}

.ktvhvn-cart-variation select option {
    white-space: normal;
    padding: 10px 12px;
    line-height: 1.6;
}

.ktvhvn-cart-item-price {
    margin-top: 8px;
    display: flex;
    align-items: baseline;
    gap: 12px;
}

.ktvhvn-cart-item-price .price-old {
    color: #94a3b8;
    text-decoration: line-through;
    font-size: 15px;
}

.ktvhvn-cart-item-price .price-current {
    font-size: 24px;
    color: #e11d48;
    font-weight: 700;
}

.ktvhvn-remove-course {
    background: #fee2e2;
    color: #b91c1c;
    border: none;
    border-radius: 6px;
    padding: 6px 12px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s ease;
}

.ktvhvn-remove-course:hover {
    background: #fecaca;
}

.ktvhvn-empty-state {
    text-align: center;
    padding: 60px 40px;
    border: 2px dashed #cbd5f5;
    border-radius: 20px;
    background: #fafbff;
}

.ktvhvn-empty-state .empty-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 18px;
    border-radius: 50%;
    background: rgba(14, 100, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #0e64ff;
    font-size: 32px;
}

.ktvhvn-empty-state h3 {
    margin-bottom: 12px;
}

.ktvhvn-layout-sidebar {
    display: flex;
    flex-direction: column;
    gap: 20px;
    position: sticky;
    top: 20px;
}

.ktvhvn-summary-card,
.ktvhvn-customer-card {
    background: #fff;
    border-radius: 18px;
    border: 1px solid #eef1fb;
    padding: 10px;
    box-shadow: 0 10px 30px rgba(15, 23, 41, 0.08);
}

.ktvhvn-summary-card {
    background: linear-gradient(135deg, #fff, #f8faff);
}

.ktvhvn-summary-line {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    font-size: 15px;
    color: #475467;
}

.ktvhvn-summary-line.total strong {
    font-size: 28px;
    color: #0f1729;
}

.ktvhvn-summary-line.savings {
    color: #16a34a;
}

.ktvhvn-alert {
    display: flex;
    align-items: center;
    gap: 10px;
    border-radius: 12px;
    padding: 12px 14px;
    font-size: 14px;
    margin-bottom: 16px;
}

.ktvhvn-alert-success {
    background: #ecfdf3;
    border: 1px solid #bbf7d0;
    color: #027a48;
}

.ktvhvn-alert-warning {
    background: #fff8e6;
    border: 1px solid #fde68a;
    color: #92400e;
}

.ktvhvn-activation-card {
    background: #fff7d6;
    border: 1px solid #fde68a;
    border-radius: 14px;
    padding: 16px 18px;
    font-weight: 600;
    color: #92400e;
    display: flex;
    align-items: center;
    gap: 12px;
}

.ktvhvn-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
}

.ktvhvn-customer-card h3 {
    margin-bottom: 18px;
}

.ktvhvn-form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2px;
    margin-bottom: 1px;
}

.ktvhvn-form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.ktvhvn-form-group label {
    font-size: 14px;
    font-weight: 600;
    color: #475467;
}

.ktvhvn-form-group .required {
    color: #ef4444;
}

.ktvhvn-field-error-message {
    display: block;
    color: #ef4444;
    font-size: 13px;
    margin-top: 6px;
    font-weight: 500;
}

.ktvhvn-form-group input,
.ktvhvn-form-group textarea {
    border: 1px solid #d9dff6;
    border-radius: 12px;
    padding: 12px 14px;
    font-size: 14px;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.ktvhvn-form-group input:focus,
.ktvhvn-form-group textarea:focus {
    outline: none;
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.18);
}

.ktvhvn-form-group input.ktvhvn-field-error,
.ktvhvn-form-group textarea.ktvhvn-field-error {
    border-color: #ef4444;
    background-color: #fef2f2;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
    animation: ktvhvn-shake 0.4s ease-in-out;
}

@keyframes ktvhvn-shake {
    0%, 100% {
        transform: translateX(0);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: translateX(-4px);
    }
    20%, 40%, 60%, 80% {
        transform: translateX(4px);
    }
}

.ktvhvn-form-group textarea {
    resize: vertical;
    min-height: 80px;
}

/* --------------------------------------------------------------
   Related courses
-------------------------------------------------------------- */
.ktvhvn-related-section {
    margin-top: 39px;
    background: #f8f9ff;
    border-radius: 10px;
    padding: 10px 10px;
    border: 1px solid #e4e7fb;
}

.ktvhvn-related-section header {
    margin-bottom: 14px;
    text-align: center;
}

.ktvhvn-related-section header h3 {
    font-size: 28px;
    margin-bottom: 12px;
}

.ktvhvn-related-section header p {
    margin-top: 8px;
    color: #5b6475;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.ktvhvn-related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 10px;
}

@media (max-width: 768px) {
    .ktvhvn-related-grid {
        grid-template-columns: 1fr;
    }
}

.ktvhvn-related-card {
    background: #fff;
    border-radius: 18px;
    border: 1px solid #e1e6ff;
    box-shadow: 0 12px 25px rgba(15, 23, 41, 0.08);
    display: flex;
    flex-direction: column;
}

.ktvhvn-related-card .card-media img {
    width: 100%;
    height: 160px;
    object-fit: cover;
    border-top-left-radius: 18px;
    border-top-right-radius: 18px;
}

.ktvhvn-related-card .card-body {
    padding: 10px 10px 8px;
    flex: 1;
}

.ktvhvn-related-card .card-desc {
    color: #6b7280;
    font-size: 14px;
    margin: 10px 0 14px;
    min-height: 48px;
}

.ktvhvn-related-card .card-prices {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.related-variation-option {
    display: flex;
    align-items: center;
    gap: 5px;
    border: 1px solid #d9dff6;
    border-radius: 5px;
    padding: 5px 5px;
    font-size: 14px;
}

.related-variation-option input {
    accent-color: #0e64ff;
}

.related-variation-option .option-name {
    flex: 1;
    font-weight: 600;
}

.related-variation-option .option-price {
    color: #0f1729;
    font-weight: 700;
}

.related-price-single {
    border: 1px dashed #cbd5f5;
    border-radius: 12px;
    padding: 12px;
    text-align: center;
    font-weight: 700;
}

.ktvhvn-related-card .card-actions {
    display: flex;
    gap: 8px;
    padding: 12px 10px 16px;
    align-items: stretch;
}

.ktvhvn-related-card .card-actions .ktvhvn-btn {
    flex: 1;
    padding: 8px 12px;
    font-size: 13px;
    height: 38px;
    min-height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
}

/* --------------------------------------------------------------
   Popups
-------------------------------------------------------------- */
.ktvhvn-popup {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: none;
}

.ktvhvn-popup-overlay {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 41, 0.65);
}

.ktvhvn-popup-content {
    position: relative;
    background: #fff;
    width: min(520px, calc(100% - 32px));
    margin: 60px auto;
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 25px 60px rgba(15, 23, 41, 0.2);
}

.ktvhvn-popup-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.ktvhvn-popup-close {
    border: none;
    background: transparent;
    font-size: 26px;
    cursor: pointer;
    line-height: 1;
    position: absolute;
    top: -12px;
    right: -40px;
    z-index: 10;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    transition: background-color 0.2s ease;
}

.ktvhvn-popup-close:hover {
    background-color: #f3f4f6;
}

.ktvhvn-popup-body ul {
    padding-left: 20px;
    color: #475467;
}

.ktvhvn-registration-total {
    margin-top: 14px;
    font-weight: 700;
    color: #111827;
}

.ktvhvn-customer-info h4 {
    font-weight: 600;
    color: #475467;
    margin: 6px 0;
}

.ktvhvn-payment-popup-content {
    width: min(420px, calc(100% - 24px));
    max-height: 90vh;
    overflow-y: auto;
    padding: 10px;
    padding-top: 16px;
}

.ktvhvn-payment-popup-content .ktvhvn-popup-header {
    margin-bottom: 1px;
    padding-right: 40px;
}

.ktvhvn-payment-popup-content .ktvhvn-popup-body {
    text-align: center;
}

.ktvhvn-payment-notice {
    background: #ecfdf3;
    border: 1px solid #bbf7d0;
    color: #14532d;
    border-radius: 10px;
    padding: 10px 12px;
    margin-bottom: 12px;
    font-size: 13px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.ktvhvn-qr-container {
    margin: 8px auto 1px;
    display: flex;
    justify-content: center;
}

.ktvhvn-qr-code {
    width: 240px;
    height: 240px;
    object-fit: contain;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    padding: 8px;
    background: #fff;
}

.ktvhvn-payment-details {
    background: #f9fafb;
    border-radius: 12px;
    padding: 12px;
    margin-bottom: 12px;
}

.ktvhvn-bank-logos {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 8px;
    margin-top: 4px;
}

.ktvhvn-bank-logos img {
    max-width: 60px;
    height: auto;
}

.ktvhvn-payment-info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 3px 8px;
    border-bottom: 1px solid #e5e7eb;
    font-size: 14px;
}

.ktvhvn-payment-info-row:last-child {
    border-bottom: none;
}

.ktvhvn-payment-info-row.highlight {
    background: #eef2ff;
    border-radius: 8px;
    margin-top: 4px;
    border: 1px solid #dbeafe;
}

.ktvhvn-payment-info-row .label {
    color: #6b7280;
    font-weight: 500;
}

.ktvhvn-payment-info-row .value {
    color: #111827;
    font-weight: 600;
}

.ktvhvn-payment-info-row.highlight .value {
    color: #1d4ed8;
}

.ktvhvn-payment-footer {
    padding-top: 1px;
}

.ktvhvn-payment-note {
    color: #6b7280;
    font-size: 13px;
    margin: 0 0 10px;
}

.ktvhvn-contact-buttons {
    display: flex;
    gap: 8px;
    justify-content: center;
}

.ktvhvn-btn-zalo {
    background: #0068ff;
    color: #fff;
    flex: 1;
}

.ktvhvn-btn-phone {
    background: #22c55e;
    color: #fff;
    flex: 1;
}

/* Scrollbar for payment popup */
.ktvhvn-payment-popup-content::-webkit-scrollbar {
    width: 6px;
}

.ktvhvn-payment-popup-content::-webkit-scrollbar-track {
    background: #f3f4f6;
}

.ktvhvn-payment-popup-content::-webkit-scrollbar-thumb {
    background: #d1d5db;
    border-radius: 10px;
}

.ktvhvn-payment-popup-content::-webkit-scrollbar-thumb:hover {
    background: #9ca3af;
}

/* Mobile responsive for payment popup */
@media (max-width: 480px) {
    .ktvhvn-payment-popup-content {
        width: calc(100% - 16px);
        padding: 12px;
        margin: 20px auto;
    }

    .ktvhvn-qr-code {
        width: 200px;
        height: 200px;
    }

    .ktvhvn-payment-info-row {
        padding: 6px 10px;
        font-size: 13px;
    }

    .ktvhvn-bank-logos img {
        max-width: 50px;
    }

    .ktvhvn-contact-buttons {
        flex-direction: column;
    }

    .ktvhvn-btn-zalo,
    .ktvhvn-btn-phone {
        width: 100%;
    }
}

/* --------------------------------------------------------------
   Responsive
-------------------------------------------------------------- */
@media (max-width: 992px) {
    .ktvhvn-layout {
        grid-template-columns: 1fr;
    }

    .ktvhvn-layout-sidebar {
        order: -1;
    }
}

@media (max-width: 640px) {
    .ktvhvn-course-picker .picker-headline {
        flex-direction: column;
        align-items: flex-start;
    }

    .ktvhvn-course-picker .picker-field {
        flex-direction: column;
        align-items: flex-start;
    }

    .ktvhvn-actions {
        grid-template-columns: 1fr;
    }

    .ktvhvn-related-card .card-actions {
        flex-direction: column;
        gap: 6px;
        padding: 10px 10px 14px;
    }

    .ktvhvn-related-card .card-actions .ktvhvn-btn {
        width: 100%;
        min-height: 38px;
    }
}

/* --------------------------------------------------------------
   Select2/SelectWoo Custom Styles
-------------------------------------------------------------- */
.ktvhvn-course-picker .select2-container {
    flex: 1;
}

.ktvhvn-course-picker .select2-container .select2-selection--single {
    height: auto;
    padding: 14px 18px;
    border-radius: 12px;
    border: 1px solid #d6daf3;
    background: #fff;
    font-size: 15px;
    transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.ktvhvn-course-picker .select2-container--focus .select2-selection--single,
.ktvhvn-course-picker .select2-container--open .select2-selection--single {
    outline: none;
    border-color: #5570ff;
    box-shadow: 0 0 0 3px rgba(85, 112, 255, 0.2);
}

.ktvhvn-course-picker .select2-container .select2-selection__rendered {
    line-height: 1.5;
    padding: 0;
    color: #1f2a37;
}

.ktvhvn-course-picker .select2-container .select2-selection__placeholder {
    color: #9ca3af;
}

.ktvhvn-course-picker .select2-container .select2-selection__arrow {
    height: 100%;
    top: 0;
    right: 18px;
}

.ktvhvn-course-picker .select2-container .select2-selection__arrow b {
    border-color: #6b7280 transparent transparent transparent;
    border-width: 6px 5px 0 5px;
}

.ktvhvn-course-picker .select2-container--open .select2-selection__arrow b {
    border-color: transparent transparent #6b7280 transparent;
    border-width: 0 5px 6px 5px;
}

/* Dropdown menu */
.select2-container--default .select2-dropdown {
    border: 1px solid #d6daf3;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(15, 23, 41, 0.15);
    margin-top: 4px;
}

.select2-container--default .select2-search--dropdown {
    padding: 12px;
    background: #f9fafb;
    border-bottom: 1px solid #e5e7eb;
}

.select2-container--default .select2-search--dropdown .select2-search__field {
    border: 1px solid #d6daf3;
    border-radius: 8px;
    padding: 10px 14px;
    font-size: 14px;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.select2-container--default .select2-search--dropdown .select2-search__field:focus {
    outline: none;
    border-color: #5570ff;
    box-shadow: 0 0 0 2px rgba(85, 112, 255, 0.15);
}

.select2-container--default .select2-results__option {
    padding: 12px 16px;
    font-size: 14px;
    color: #1f2a37;
}

.select2-container--default .select2-results__option--highlighted[aria-selected] {
    background-color: #f3f7ff;
    color: #0f1729;
}

.select2-container--default .select2-results__option[aria-selected=true] {
    background-color: #e1e8ff;
    color: #0f1729;
    font-weight: 500;
}

.select2-container--default .select2-results > .select2-results__options {
    max-height: 300px;
}

.select2-container--default .select2-results__option--disabled {
    color: #9ca3af;
}

.select2-results__message {
    padding: 12px 16px;
    color: #6b7280;
    font-size: 14px;
}

/* Custom Autocomplete for Course Selection */
.ktvhvn-autocomplete-wrapper {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
}

.ktvhvn-course-autocomplete {
    flex: 1;
    padding: 14px 18px;
    border-radius: 12px;
    border: 1px solid #d6daf3;
    background: #fff;
    font-size: 15px;
    transition: box-shadow 0.2s ease, border-color 0.2s ease;
    width: 100%;
}

.ktvhvn-course-autocomplete:focus {
    outline: none;
    border-color: #5570ff;
    box-shadow: 0 0 0 3px rgba(85, 112, 255, 0.2);
}

.ktvhvn-course-autocomplete::placeholder {
    color: #9ca3af;
}

.ktvhvn-autocomplete-dropdown {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    right: 0;
    background: #fff;
    border: 1px solid #d6daf3;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(15, 23, 41, 0.15);
    max-height: 320px;
    overflow-y: auto;
    z-index: 1000;
}

.ktvhvn-autocomplete-item {
    padding: 12px 16px;
    cursor: pointer;
    transition: background-color 0.15s ease;
    border-bottom: 1px solid #f3f4f6;
}

.ktvhvn-autocomplete-item:last-child {
    border-bottom: none;
}

.ktvhvn-autocomplete-item:hover {
    background-color: #f3f7ff;
}

.ktvhvn-autocomplete-item .course-name {
    font-size: 14px;
    color: #1f2a37;
    display: block;
}

.ktvhvn-autocomplete-empty {
    padding: 20px 16px;
    text-align: center;
    color: #6b7280;
    font-size: 14px;
}

/* Make sure the picker field is positioned relatively for dropdown */
.ktvhvn-course-picker .picker-field {
    position: relative;
}

/* Scrollbar styling for dropdown */
.ktvhvn-autocomplete-dropdown::-webkit-scrollbar {
    width: 8px;
}

.ktvhvn-autocomplete-dropdown::-webkit-scrollbar-track {
    background: #f3f4f6;
    border-radius: 0 12px 12px 0;
}

.ktvhvn-autocomplete-dropdown::-webkit-scrollbar-thumb {
    background: #d1d5db;
    border-radius: 10px;
}

.ktvhvn-autocomplete-dropdown::-webkit-scrollbar-thumb:hover {
    background: #9ca3af;
}

/* Customer exists warning message */
.ktvhvn-customer-exists-warning {
    background: linear-gradient(135deg, #fff5f5 0%, #fed7d7 100%);
    border-left: 4px solid #e53e3e;
    border-radius: 8px;
    padding: 12px 16px;
    margin-top: 8px;
    margin-bottom: 16px;
    font-size: 14px;
    font-weight: 500;
    color: #c53030;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 2px 8px rgba(229, 62, 62, 0.15);
    animation: slideDown 0.3s ease-out;
}

.ktvhvn-customer-exists-warning i {
    font-size: 18px;
    color: #e53e3e;
    flex-shrink: 0;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Mobile responsive */
@media (max-width: 640px) {
    .ktvhvn-course-picker .select2-container {
        width: 100% !important;
    }

    .ktvhvn-autocomplete-dropdown {
        max-height: 280px;
    }

    .ktvhvn-autocomplete-item {
        padding: 14px 16px;
    }

    .ktvhvn-course-autocomplete {
        font-size: 16px; /* Prevent zoom on iOS */
    }

    .ktvhvn-customer-exists-warning {
        font-size: 13px;
        padding: 10px 14px;
    }

    /* Fix sticky header overlay on mobile */
    .ktvhvn-layout-sidebar {
        position: relative;
        top: auto;
    }
}